diff --git a/xCAT-server/lib/xcat/plugins/xcat2nim.pm b/xCAT-server/lib/xcat/plugins/xcat2nim.pm
index af6c5e837..a5e09d978 100644
--- a/xCAT-server/lib/xcat/plugins/xcat2nim.pm
+++ b/xCAT-server/lib/xcat/plugins/xcat2nim.pm
@@ -77,7 +77,8 @@ sub preprocess_request
 	my $req = shift;
     my $cb  = shift;
     my %sn;
-    if ($req->{_xcatdest}) { return [$req]; }    #exit if preprocessed
+    if ($req->{_xcatpreprocessed}->[0] == 1) { return [$req]; }
+        #exit if preprocessed
     my $nodes    = $req->{node}; # this may not be the list of nodes we need!
 	my $command  = $req->{command}->[0];
 	$::args     = $req->{arg};
@@ -108,6 +109,7 @@ sub preprocess_request
                 	my $reqcopy = {%$req};
                 	$reqcopy->{node} = $sn->{$snkey};
                 	$reqcopy->{'_xcatdest'} = $snkey;
+                  $reqcopy->{_xcatpreprocessed}->[0] = 1;
 
                 	push @requests, $reqcopy;
             	}